What size fuel tank does the 1995 mecury villager have? on 1995 Mercury Villager

Trying to estimate how much it would cost to fill it all the way up. It was bought used so I don't have the owner's manual.

2 answers
my tank is 15 gallons and at the price of gas now being $3.12 I pay $55.00 on full or over. I also don't have a owner's manual.
Repair manual says 20 gallons.